Direct detection of a break in the teraelectronvolt cosmic-ray spectrum of electrons and positrons

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	Direct detection of a break in the teraelectronvolt cosmic-ray spectrum of electrons and positrons
	G. Ambrosi; Q. An; R. Asfandiyarov; P. Azzarello; P. Bernardini; B. Bertucci; M. S. Cai; J. Chang; D. Y. Chen; H. F. Chen; J. L. Chen; W. Chen; M. Y. Cui; T. S. Cui; A. D’Amone; A. De Benedittis; I. De Mitri; M. Di Santo; J. N. Dong; T. K. Dong; Y. F. Dong; Z. X. Dong; G. Donvito; D. Droz; K. K. Duan; J. L. Duan; M. Duranti; D. D’Urso; R. R. Fan; Y. Z. Fan; F. Fang; C. Q. Feng; L. Feng; P. Fusco; V. Gallo; F. J. Gan; M. Gao; S. S. Gao; F. Gargano; S. Garrappa; K. Gong; Y. Z. Gong; D. Y. Guo; J. H. Guo; Y. M. Hu; G. S. Huang; Y. Y. Huang; M. Ionica; D. Jiang; W. Jiang; X. Jin; J. Kong; S. J. Lei; S. Li; X. Li; W. L. Li; Y. Li; Y. F. Liang; Y. M. Liang; N. H. Liao; H. Liu; J. Liu; S. B. Liu; W. Q. Liu; Y. Liu; F. Loparco; M. Ma; P. X. Ma; S. Y. Ma; T. Ma; X. Q. Ma; X. Y. Ma; G. Marsella; M. N. Mazziotta; D. Mo; X. Y. Niu; X. Y. Peng; W. X. Peng; R. Qiao; J. N. Rao; M. M. Salinas; G. Z. Shang; W. H. Shen; Z. Q. Shen; Z. T. Shen; J. X. Song; H. Su; M. Su; Z. Y. Sun; A. Surdo; X. J. Teng; X. B. Tian; A. Tykhonov; V. Vagelli; S. Vitillo; C. Wang; H. Wang; H. Y. Wang; J. Z. Wang; L. G. Wang; Q. Wang; S. Wang; X. H. Wang; X. L. Wang; Y. F. Wang; Y. P. Wang; Y. Z. Wang; S. C. Wen; Z. M. Wang; D. M. Wei; J. J. Wei; Y. F. Wei; D. Wu; J. Wu; L. B. Wu; S. S. Wu; X. Wu; K. Xi; Z. Q. Xia; Y. L. Xin; H. T. Xu; Z. L. Xu; Z. Z. Xu; G. F. Xue; H. B. Yang; P. Yang; Y. Q. Yang; Z. L. Yang; H. J. Yao; Y. H. Yu; Q. Yuan; C. Yue; J. J. Zang; C. Zhang; D. L. Zhang; F. Zhang; J. B. Zhang; J. Y. Zhang; J. Z. Zhang; L. Zhang; P. F. Zhang; S. X. Zhang; W. Z. Zhang; Y. Zhang; Y. J. Zhang; Y. Q. Zhang; Y. L. Zhang; Y. P. Zhang; Z. Zhang; Z. Y. Zhang; H. Zhao; H. Y. Zhao; X. F. Zhao; C. Y. Zhou; Y. Zhou; X. Zhu; Y. Zhu & S. Zimmer
作者部门	空间技术部
发表期刊	Nature
	2017
ISSN	0028-0836
语种	英语
关键词	Particle Dark-matter Supernova-remnants Dampe Propagation Candidates Signature Energies Galaxy
摘要	High-energy cosmic-ray electrons and positrons (CREs), which lose energy quickly during their propagation, provide a probe of Galactic high-energy processes(1-7) and may enable the observation of phenomena such as dark-matter particle annihilation or decay(8-10). The CRE spectrum has been measured directly up to approximately 2 teraelectronvolts in previous balloon-or space-borne experiments(11-16), and indirectly up to approximately 5 teraelectronvolts using ground-based Cherenkov gamma-ray telescope arrays(17,18). Evidence for a spectral break in the teraelectronvolt energy range has been provided by indirect measurements(17,18), although the results were qualified by sizeable systematic uncertainties. Here we report a direct measurement of CREs in the energy range 25 gigaelectronvolts to 4.6 teraelectronvolts by the Dark Matter Particle Explorer (DAMPE)(19) with unprecedentedly high energy resolution and low background. The largest part of the spectrum can be well fitted by a 'smoothly broken power-law' model rather than a single power-law model. The direct detection of a spectral break at about 0.9 teraelectronvolts confirms the evidence found by previous indirect measurements(17,18), clarifies the behaviour of the CRE spectrum at energies above 1 teraelectronvolt and sheds light on the physical origin of the sub-teraelectronvolt CREs.
收录类别	SCI
文献类型	期刊论文
条目标识符	http://ir.nssc.ac.cn/handle/122/6041
专题	空间技术部
推荐引用方式 GB/T 7714	G. Ambrosi,Q. An,R. Asfandiyarov,et al. Direct detection of a break in the teraelectronvolt cosmic-ray spectrum of electrons and positrons[J]. Nature,2017.
APA	G. Ambrosi.,Q. An.,R. Asfandiyarov.,P. Azzarello.,P. Bernardini.,...&Y. Zhu & S. Zimmer.(2017).Direct detection of a break in the teraelectronvolt cosmic-ray spectrum of electrons and positrons.Nature.
MLA	G. Ambrosi,et al."Direct detection of a break in the teraelectronvolt cosmic-ray spectrum of electrons and positrons".Nature (2017).

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